Electroluminescent display panel and display device

ABSTRACT

Disclosed is an electroluminescent display panel and a display device, and relates to the field of display technologies. The display region comprises a photosensitive device arranging region, a camera or fingerprint recognition device is arranged in the photosensitive device arranging region, rather than in the frame, and thus a relatively larger area occupying in the frame is avoided, to allow the frame be made narrower, and the screen-to-body ratio be increased. Also for the photosensitive device arranging region, the first signal lines and the second signal lines are arranged more intensively by arranging overlap areas in the orthographic projection of one first pixel on the base substrate, to allow the display panel have more concentrated space as the light-transmission region, so that the light transmittance of the photosensitive device arranging region can be increased to provide more lights to the camera or fingerprint recognition device.

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.16/718,225, filed on Dec. 18, 2019, which claims priority to ChinesePatent Application No. 201910817502.6, filed with the Chinese PatentOffice on Aug. 30, 2019. The entire disclosure of the above applicationis incorporated herein by reference.

FIELD

The disclosure relates to the field of display technologies andparticularly to an electroluminescent display panel and a displaydevice.

BACKGROUND

Electroluminescent displays are a type of self light-emitting device,which can be operated without a backlight source, and thus can beapplied to a variety of scenarios since the display can be made lighterand thinner than the liquid crystal display.

The display panel in the electroluminescent display generally has adisplay region and a frame region surrounding the display region. Acamera and other optical devices may be arranged in the frame region.Due to the larger volume of the camera, the area of the frame regionoccupied by the camera is larger, which is a limit to allow the displaypanel to have high screen-to-body ratio and narrow frame design.

SUMMARY

The embodiments of the disclosure provide an electroluminescent displaypanel and a display device, to increase the screen-to-body ratio of thedisplay panel and implement the narrow frame design.

In one embodiment of the disclosure provides an electroluminescentdisplay panel. The electroluminescent display panel includes a displayregion including a photosensitive device arranging region and a normaldisplay region which at least partly surrounds the photosensitive devicearranging region. The display region includes pixels including firstpixels located in the photosensitive device arranging region, where aregion between adjacent first pixels is a light-transmission region. Theelectroluminescent display panel further includes: a base substrate, andfirst signal lines and second signal lines located on the basesubstrate. The first pixels are electrically connected to the firstsignal lines and the second signal lines respectively, all the firstsignal lines are arranged in a column direction and extend in a rowdirection, and all the second signal lines are arranged in the rowdirection and extend in the column direction. The orthographicprojections of the first signal lines and the second signal lines on thebase substrate have overlap areas, and in the photosensitive devicearranging region, overlap areas are located in an orthographicprojection of one first pixel on the base substrate.

In one embodiment of the disclosure provides a display device including:the above-mentioned electroluminescent display panel as provided by theembodiment of the disclosure; and a camera or fingerprint recognitiondevice is arranged in the photosensitive device arranging region of theelectroluminescent display panel.

For the electroluminescent display panel and the display device providedby the embodiments of the disclosure, firstly the display regionincludes a photosensitive device arranging region, and a camera orfingerprint recognition device is arranged in the photosensitive devicearranging region, rather than in the frame, and thus a relatively largerarea occupying in the frame is avoided, to allow the frame be madenarrower, and the screen-to-body ratio be increased.

Secondly for the photosensitive device arranging region, the firstsignal lines and the second signal lines are arranged more intensivelyby arranging overlap areas in the orthographic projection of one firstpixel on the base substrate, to allow the display panel have moreconcentrated space as the light-transmission region, so that the lighttransmittance of the photosensitive device arranging region can beincreased to provide more lights to the camera or fingerprintrecognition device so that the camera or fingerprint recognition devicecan work normally and efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic diagram of an electroluminescentdisplay panel provided in some embodiments of the disclosure;

FIG. 2 is a structural schematic diagram of another electroluminescentdisplay panel provided in some embodiments of the disclosure;

FIGS. 3, 4, 5, 6 and 7 are different enlarged layout views of a portioninside the solid box 1 in FIG. 1 respectively;

FIG. 8 is a structural schematic diagram of a first pixel provided insome embodiments of the disclosure;

FIG. 9 is a structural schematic diagram of the adjacent first pixelsprovided in some embodiments of the disclosure;

FIG. 10 is an enlarged layout view of a portion inside the solid box 2in FIG. 1;

FIG. 11 is a structural schematic diagram of a display device providedin some embodiments of the disclosure.

Where:

-   A—display region-   A1—normal display region-   G—photosensitive device arranging region-   S1—first signal line-   S2, S21—second signal line-   S0—signal line-   T—light-transmission region-   P1, P11, P12, P13, P14, P15, P16, P17, P18, P19, P20—first pixel-   P2—second pixel-   D1—first segment-   D2—second segment-   D3—third segment-   F1—first subsection-   F2—second subsection-   Z1, Z2, Z3—first signal line group-   10—electroluminescent display panel-   20—photosensitive device-   100—display device

DETAILED DESCRIPTION OF EMBODIMENTS

Electroluminescent display panel and display device provided by theembodiments of the disclosure will be illustrated below in details withreference to the drawings.

Embodiments of the disclosure provide an electroluminescent displaypanel, as illustrated in FIGS. 1-7, where FIG. 1 is a structuralschematic diagram of an electroluminescent display panel, FIG. 2 is astructural schematic diagram of another electroluminescent displaypanel, and FIGS. 3-7 are the enlarged layout views of differentstructures inside the solid box 1 in FIG. 1 respectively.

According to one or more embodiments, as illustrated in FIGS. 1 and 2according to, the electroluminescent display panel includes a displayregion A, and the display region A includes a photosensitive devicearranging region G and a normal display region A1 which at least partlysurrounds the photosensitive device arranging region G.

According to one or more embodiments, as illustrated in FIGS. 3-7, thedisplay region A includes pixels including the first pixels (such asP11, P12, P13, P14, P15, P16, P17, P18, P19, P20) located in thephotosensitive device arranging region G, where the region between theadjacent first pixels is the light-transmission region T; the externallight can be incident into the photosensitive device (e.g., camera orfingerprint recognition device or the like) through thelight-transmission region T, so that the photosensitive device worksafter receiving the incident light.

The electroluminescent display panel further includes: a base substrate(not shown in FIGS. 1-7), and first signal lines S1 and second signallines S2 located on the base substrate, where the first pixels areelectrically connected to the first signal lines S1 and the secondsignal lines S2 respectively, all the first signal lines S1 are arrangedin the column direction and extend in the row direction, and all thesecond signal lines S2 are arranged in the row direction and extend inthe column direction.

The orthographic projections of the first signal lines S1 and the secondsignal lines S2 on the base substrate have the overlap areas (which canbe understood as the intersecting positions of the first signal lines S1and the second signal lines S2 in FIGS. 3-7), and in the photosensitivedevice arranging region G, overlap areas are located in the orthographicprojection of one first pixel on the base substrate.

In one or more embodiments of the disclosure, the display regionincludes the photosensitive device arranging region G, and a camera orfingerprint recognition device is arranged in the photosensitive devicearranging region, rather than in the frame, and thus a relatively largerarea occupying in the frame is avoided, to allow the frame be madenarrower, and the screen-to-body ratio be increased.

In the actual situation, for the photosensitive device arranging regionG, if the orthographic projection of each first pixel on the basesubstrate corresponds to one overlap area, the first signal lines S1 andthe second signal lines S2 are arranged relatively distributed; and ifthe first signal lines S1 and the second signal lines S2 are made of theelectrically conductive material with lower light transmittance, thedistributed first signal lines S1 and second signal lines S2 may blockmore light which will bring the decreased light transmittance.

In one or more embodiment of the disclosure, for the photosensitivedevice arranging region G, the first signal lines S1 and the secondsignal lines S2 are arranged more intensively by arranging overlap areasin the orthographic projection of one first pixel on the base substrate,to allow the display panel have more concentrated space as thelight-transmission region, so that the light transmittance of thephotosensitive device arranging region G can be increased to providemore lights to the camera or fingerprint recognition device so that thecamera or fingerprint recognition device can work normally andefficiently.

In one or more embodiments of the disclosure, as illustrated in FIG. 10which is an enlarged view of the solid box 2 in FIG. 1, the pixelsfurther include the second pixels P2 arranged in an array and located inthe normal display region A1, where the arranging density of the secondpixels P2 is larger than the arranging density of the first pixels P1.Further, in the normal display region A1, there is an overlap area inthe orthographic projection(s) of at least a part of the second pixelsP2 on the base substrate, to ensure the normal display function of thenormal display region A1. Since there is no particular requirements onthe light transmittance for the normal display region A1, the secondpixels P2 and the overlap areas in this region can be arranged withoutspecific limitations, to lower the structure complexity of theelectroluminescent display panel and thus lower the difficulty offabricating the electroluminescent display panel.

In one or more embodiments of the disclosure, the shape of thephotosensitive device arranging region G can be a square (as illustratedin FIG. 1) or can be an oval (as illustrated in FIG. 2). Of course, itcan also be another shape, which is not limited here and can be setaccording to the actual demand to increase the design flexibility.

In one or more embodiments of the disclosure, the first signal lines S1are the scan lines, reference signal lines or light emission controlsignal lines, and the second signal lines S2 are the data lines or powersupply signal lines, as illustrated in FIGS. 3-7. In one embodiment, insome embodiments, the first signal lines are the data lines or powersupply signal lines, and the second signal lines are the scan lines,reference signal lines or light emission control signal lines, which isnot limited here. The following is illustrated in an example where thefirst signal lines S1 are the scan lines, reference signal lines orlight emission control signal lines and the second signal lines S2 arethe data lines or power supply signal lines.

In one or more embodiments of the disclosure, in the photosensitivedevice arranging region G, overlap areas being located in theorthographic projection of one first pixel on the base substrate,includes that two overlap areas are located in the orthographicprojection of one first pixel on the base substrate, as illustrated inFIGS. 3, 5 and 6; or that three overlap areas are located in theorthographic projection of one first pixel on the base substrate, asillustrated in FIG. 4; or that four overlap areas are located in theorthographic projection of one first pixel on the base substrate, asillustrated in FIG. 7; of course, it is also possible that N overlapareas are located in the orthographic projection of one first pixel onthe base substrate (not shown in the figure), where N is an integergreater than 4, not limited here, and set according to the actualdemand, to increase the design flexibility and further improve the lighttransmittance of the photosensitive device arranging region G.

In one embodiment, in the structure as illustrated in FIG. 3 accordingto one or more embodiments, the overlap areas of the orthographicprojections of one second signal line S2 and two first signal lines S1on the base substrate are located in the orthographic projection of thesame first pixel (e.g., the first pixel marked as P11 in FIG. 3) on thebase substrate.

In another embodiment, in the structure as illustrated in FIG. 5according to one or more embodiments, the overlap areas of theorthographic projections of one first signal line S1 and two secondsignal lines S2 on the base substrate are located in the orthographicprojection of the same first pixel (e.g., the first pixel marked as P12in FIG. 5) on the base substrate.

In yet another embodiment, in the structure as illustrated in FIG. 7according to one or more embodiments, the overlap areas of theorthographic projections of two first signal lines S1 and two secondsignal lines S2 on the base substrate are located in the orthographicprojection of the same first pixel (e.g., the first pixel marked as P13in FIG. 7) on the base substrate.

In one or more embodiments of the disclosure, each pixel includes alight emitting unit, and the region where the light emitting unit islocated can be understood as the opening region of the pixel. The pixelemits the light through this opening region, to implement the displayfunction of the electroluminescent display panel. Here, that overlapareas are located in the orthographic projection of one first pixel onthe base substrate can be understood as that overlap areas are locatedin one opening region.

In one embodiment, in order to further improve the light transmittanceof the photosensitive device arranging region G, in one or moreembodiments of the disclosure, there can be several ways as follows:

First Way:

In one or more embodiments, as illustrated in FIGS. 6, 8 and 9, thefirst pixel includes a first subsection F1 and at least one secondsubsection F2, where the respective second subsections are located atthe edge of the first subsection F1 and connected to the firstsubsection F1, the arranging direction of the second subsections F2 andthe first subsection F1 is parallel to the extending direction of thefirst signal lines S1 or the second signal lines S2.

In one embodiment, referring to the structural schematic diagram of thefirst pixel shown in FIG. 8, this first pixel includes one firstsubsection F1 and two second subsections F2, where the two secondsubsections F2 are located at two opposite sides of the first subsectionF1 respectively, and the arranging direction of the first subsection F1and the second subsections F2 is parallel to the extending direction ofthe second signal line S2 (the Y direction as illustrated in FIG. 8). Atthe same time, in FIG. 8, the orthographic projections of one secondsignal line S2 and each of two first signal lines S1 on the basesubstrate have an overlap area, and these two overlap areas are arrangedalong the Y direction.

That is, the arranging direction of two overlap areas is the same as thearranging direction of the first subsection F1 and the secondsubsections F2. The arrangement of the first subsection and the secondsubsections can facilitate the decrease in the length of the firstpixels in the X direction in FIG. 8, to leave more space in the Xdirection for the light-transmission region, increase the area of thelight-transmission region, and thus further improve the lighttransmittance of the photosensitive device arranging region G.

It is noted that the above-mentioned first and second subsections areused for illustrating the shape of the orthographic projection of thefirst pixel on the base substrate, but will not have a limitation on therelative connection relationships among all the structures included inthe first pixel. Thus, the shape of the orthographic projection of thefirst pixel on the base substrate can be adjusted on the basis ofremaining the structure of the first pixel unchanged, to improve thelight transmittance of the photosensitive device arranging region.

In one or more embodiments of the disclosure, as illustrated in FIGS. 6and 9, when the arranging direction of the first and second subsectionsis parallel to the extending direction of the first or second signallines, in at least a part of first pixels which are adjacent to eachother:

the first and second subsections in one first pixel are arranged alongthe first direction, and the first and second subsections in the otherfirst pixel are arranged in the direction perpendicularly to the firstdirection;

where the first direction is the column or row direction.

In one or more embodiments, as illustrated in FIG. 6, for each firstpixel arranged in the column direction, both the first subsection F1 andthe second subsection F2 are arranged along the column direction; andfor each first pixel arranged in the row direction, both the firstsubsection F1 and the second subsection F2 are arranged along the rowdirection.

In one or more embodiments, by taking the structural schematic diagramof the adjacent first pixels as illustrated in FIG. 9 as an example, twofirst pixels marked as P14 and P15 are arranged adjacently in the Xdirection; where the first subsection F1 and the second subsections F2in the first pixel P14 are arranged along the Y direction, and the firstsubsection F1 and the second subsections F2 in the first pixel P15 arearranged along the X direction.

Similarly, two first pixels marked as P14 and P16 are arrangedadjacently in the Y direction; where the first subsection F1 and thesecond subsections F2 in the first pixel P14 are arranged along the Ydirection, and the first subsection F1 and the second subsections F2 inthe first pixel P16 are arranged along the X direction.

Thus, by setting the arranging direction of the first subsection F1 andthe second subsections F2 in the first pixel, not only the spaceoccupied by the first pixel in the photosensitive device arrangingregion G can be adjusted to leave more space for the light-transmissionregion and further improve the light transmittance of the photosensitivedevice arranging region G, but also the area of the opening region ofthe first pixel can be adjusted. Since the pixels include the firstpixels located in the photosensitive device arranging region G and thesecond pixels located in the normal display region A1, and the arrangingdensity of the first pixels is less than the arranging density of thesecond pixels, the area of the opening region of the first pixel can beadjusted to reduce the display brightness difference due to the lowarranging density of the first pixels and to further improve the displayuniformity.

Second Way:

In one or more embodiments, signal line S0 is introduced and therelationship between the signal lines S0 (as illustrated in FIGS. 3-7)and the first pixels is described at first.

In one or more embodiments of the disclosure, M adjacent first signallines located in the photosensitive device arranging region form a firstsignal line group, and the spacing between the adjacent first signalline groups is larger than the spacing between two adjacent first signallines in one first signal line group; the orthographic projections ofall the first signal lines in the first signal line group and theorthographic projection of one second signal line on the base substratehave M overlap areas, and the M overlap areas are located in theorthographic projection of at least one first pixel on the basesubstrate;

and/or, N adjacent second signal lines located in the photosensitivedevice arranging region form a second signal line group, and the spacingbetween the adjacent second signal line groups is larger than thespacing between two adjacent second signal lines in one second signalline group; the orthographic projections of all the second signal linesin the second signal line group and the orthographic projection of onefirst signal line on the base substrate have N overlap areas, and the Noverlap areas are located in the orthographic projection of at least onefirst pixel on the base substrate;

where M and N are both integers greater than 1.

In one embodiment, referring to FIG. 3, Z1 represents one first signalline group which includes two first signal lines S1, the spacing betweentwo adjacent first signal line groups Z1 is represented by h1, and thespacing between two adjacent first signal lines S1 in the first signalline group Z1 is represented by h2, where h1 is larger than h2. Theorthographic projections of each first signal line group Z1 and onesecond signal line S2 on the base substrate have two overlap areas,i.e., M is 2, where these two overlap areas are located in theorthographic projection of one first pixel (e.g., the first pixel markedas P11 in FIG. 3) on the base substrate.

In another embodiment, referring to FIG. 7, there are the first signalline group (consisted of two first signal lines arranged closely) andthe second signal line group (consisted of two second signal linesarranged closely), each first signal line group includes two firstsignal lines S1, each second signal line group includes two secondsignal lines S2, and the orthographic projections of each first signalline group and each second signal line group on the base substrate havefour overlap areas, where the number of the overlap areas can beunderstood as M*N, that is, M is 2, N is 2, so M*N is 4, and these fouroverlap areas are located in the orthographic projection of one firstpixel (e.g., the first pixel marked as P13 in FIG. 7) on the basesubstrate.

As can be seen, the setting of signal line group(s) can facilitate theimplementation of locating overlap areas in the orthographic projectionof one first pixel on the base substrate, to facilitate improving thelight transmittance of the photosensitive device arranging region G.

Based on this, in order to further improve the light transmittance ofthe photosensitive device arranging region G, in one or moreembodiments, as illustrated in FIGS. 4-7, the length of the spacing inthe first direction between two adjacent first pixels electricallyconnected to the signal lines in the same signal line group is the firstlength, and the length of the spacing in the first direction between thefirst pixels which are electrically connected to the signal lines in twoadjacent signal line groups respectively and are adjacent in the firstdirection is the second length, where the first length is smaller thanthe second length;

where the signal lines are the first signal lines, the signal linegroups are the first signal line groups, the first direction is thecolumn direction; and/or the signal lines are the second signal lines,the signal line groups are the second signal line groups, the firstdirection is the row direction.

In one embodiment, referring to FIG. 4, for the first signal line groupmarked as Z2, the first pixels electrically connected to the firstsignal line group Z2 are marked as P18, P19 and P20 respectively, andthe first pixel marked as P17 is the first pixel electrically connectedto the first signal line group marked as Z3.

Here, among the respective first pixels (e.g., P18, P19 and P20)electrically connected to the first signal line group Z2 and therespective first pixels (only P17 is shown in the figure) electricallyconnected to the first signal line group Z3, two first pixels adjacentin the Y direction are P17 and P18 respectively, the spacing betweenthem is the second length and represented by h4, and the spacing in theY direction between two adjacent first pixels electrically connected tothe signal lines in the first signal line group Z2 is the first lengthand represented by h3, where h3 is smaller than h4.

Thus, the first pixels electrically connected to the signal lines in thesame signal line group are arranged more closely, to reduce the firstlength between these first pixels, so that more space can be left forthe light-transmission region to further improve the light transmittanceof the photosensitive device arranging region G.

In one or more embodiments of the disclosure, the signal line groupincludes at least three signal lines, and all the first lengths are thesame. As illustrated in FIG. 4, the first length of any two first pixelsof the first pixels P18, P19 and P20 in the first direction is h3.

Thus, the structure complexity of the electroluminescent display panelcan be simplified, and the difficulty of fabricating theelectroluminescent display panel can be lowered.

Third Way:

In one or more embodiments of the disclosure, the orthographicprojections of at least a part of the first pixels on the base substratehave overlap areas.

In one or more embodiments, the orthographic projections of a part ofthe first pixels on the base substrate have overlap areas. In oneembodiment, as illustrated in FIG. 9, the orthographic projection ofeach of the first pixels marked as P14 and P15 on the base substrate hastwo overlap areas, and the orthographic projection of the first pixelmarked as P16 on the base substrate has no overlap area.

Thus, a part of the first signal lines S1 and a part of the secondsignal lines S2 are arranged more intensively, to leave the more andmore concentrated space as the light-transmission region to some extent,so that the light transmittance of the photosensitive device arrangingregion G can be increased to some extent.

In one or more embodiments, the orthographic projections of all thefirst pixels on the base substrate have overlap areas. In oneembodiment, as illustrated in FIG. 10, the region filled with the sparseblack spots represents a part of the photosensitive device arrangingregion G, and as shown, the orthographic projection of each of threefirst pixels located in this region on the base substrate has twooverlap areas.

Thus, on the one hand, the first signal lines S1 and the second signallines S2 can be arranged more intensively to the most extent, in orderto leave the more and more concentrated space as the light-transmissionregion, so that the light transmittance of the photosensitive devicearranging region G can be increased as much as possible, to provide morelights to the camera or fingerprint recognition device so that thecamera or fingerprint recognition device can work normally andefficiently. On the other hand, different settings can be performedaccording to the actual demand, to increase the design flexibility andalso meet the requirements of different application scenarios.

Based on this, in one or more embodiments of the disclosure, theorthographic projections of a part of the first pixels on the basesubstrate have overlap areas, and the orthographic projections of theother first pixels on the base substrate have no overlap area;

the area of the orthographic projection of the first pixel correspondingto no overlap area on the base substrate is smaller than the area of theorthographic projection of the first pixel corresponding to overlapareas on the base substrate.

In one embodiment, by taking the structure shown in FIG. 9 as anexample, the orthographic projection of each of the first pixels markedas P14 and P15 on the base substrate has two overlap areas, and theorthographic projection of the first pixel marked as P16 on the basesubstrate has no overlap area, where the area of the orthographicprojection of the first pixel P14 on the base substrate is larger thanthe area of the orthographic projection of the first pixel P16 on thebase substrate.

Thus, the space occupied by the first pixel corresponding to no overlaparea can be reduced, to leave more space as the light-transmissionregion and further improve the light transmittance of the photosensitivedevice arranging region G.

In one or more embodiments of the disclosure, the areas of theorthographic projections of all the first pixels on the base substrateare the same, as illustrated in FIGS. 3-7 and 10. Thus, the difficultyof fabricating the first pixel may be lowered greatly, and then thedifficulty of fabricating the electroluminescent display panel islowered, to improve the production efficiency and the product yield ofthe display devices.

It is necessary to note that the three ways described above can be usedin combination or used separately in the actual situation, which is notlimited here, and can be set and selected according to the actualdemand, to increase the design flexibility and also meet therequirements of different application scenarios.

In one embodiment, for the structure as illustrated in FIG. 2, thenormal display region A1 surrounds the photosensitive device arrangingregion G Even if the arranging density of the first pixels is less thanthe arranging density of the second pixels, the second signal lines S2extends to the photosensitive device arranging region G and passesthrough the photosensitive device arranging region G to the normaldisplay region A1, so there are redundant second signal lines S2arranged in the photosensitive device arranging region G at this time.In order to reduce the shielding of the second signal lines S2 for thelight, the second signal lines S2 can be arranged according to theembodiments of the disclosure.

For the structure as illustrated in FIG. 1, the photosensitive devicearranging region G is located at the edge of one side of the displayregion A closed to the non-display region B. In one or more embodiments,since the arranging density of the first pixels is less than thearranging density of the second pixels, a part of the second signallines S2 are set to extend into the photosensitive device arrangingregion G, to decrease the number of the second signal lines S2 arrangedin the photosensitive device arranging region G and further improve thelight transmittance of the photosensitive device arranging region G.

Similarly, in one or more embodiments, for the structure as illustratedin FIG. 1, all the second signal lines S2 is set to extend into thephotosensitive device arranging region G, to facilitate reducing theload differences among all the second signal lines S2. At this time, inorder to reduce the shielding of the second signal lines S2 for thelight, there is also a need to arrange the second signal lines S2according to the embodiments of the disclosure.

Similarly, there is also a need to arrange the first signal lines S1according to the embodiments of the disclosure.

Therefore, in an embodiment of the disclosure, the shapes of theorthographic projections of the first signal lines S1 and/or the secondsignal lines S2 passing through the photosensitive device arrangingregion G on the base substrate can be the folded-line shape, asillustrated in FIG. 10.

Thus, it is possible to facilitate the closer arrangement of all thesignal lines (including the first signal lines S1 and the second signallines S2) in the photosensitive device arranging region G to provide thelarger light-transmission region, to locate overlap areas in theorthographic projection of one first pixel on the base substrate andimprove the light transmittance of the photosensitive device arrangingregion G.

In one or more embodiments, in order to implement the above-mentionedarrangement of the signal lines, each of the first signal lines and/orthe second signal lines passing through the photosensitive devicearranging region includes: a first segment, a second segment, and athird segment connecting the first and second segments, where the firstsegment is located in the normal display region and extends along thesecond direction, the second segment is located in the photosensitivedevice arranging region and extends along the second direction, and thethird segment extends along the third direction;

where the third direction intersects with the row direction and thecolumn direction respectively; the first signal line includes: a firstsegment, a second segment and a third segment, and the second directionis the row direction; the second signal line includes: a first segment,a second segment and a third segment, and the second direction is thecolumn direction.

In one embodiment, referring to the structure as illustrated in FIG. 10,the second signal line at the rightmost in the figure is marked as S21,and this second signal line S21 includes: a first segment D1, a secondsegment D2, and a third segment D3 connecting the first segment D1 andthe second segment D2, where both the first segment D1 and the secondsegment D2 extend along the Y direction, and the third segment D3extends along the third direction (i.e., K direction as illustrated inthe figure).

Thus, the shape of the orthographic projection of the signal line on thebase substrate can be set to be the folded-line shape by thesegmentation of the signal line, facilitating the closer arrangement ofall the signal lines (including the first signal lines S1 and the secondsignal lines S2) in the photosensitive device arranging region G toprovide the larger light-transmission region, to locate overlap areas inthe orthographic projection of one first pixel on the base substrate andimprove the light transmittance of the photosensitive device arrangingregion G.

Based upon the same inventive concept, one or more embodiments of thedisclosure provides a display device 100, and as illustrated in FIG. 11which is a structural schematic diagram of the display device, thedisplay device 100 includes the electroluminescent display panel 10described above and provided by the embodiments of the disclosure.

Here, as illustrated in FIG. 11, an photosensitive device 20 is arrangedat the place corresponding to the photosensitive device arranging regionG of the electroluminescent display panel 10, and the photosensitivedevice 20 may be a camera or fingerprint recognition device.

In one or more embodiments, the display device may be a mobile phone, atablet, a television, a display, a laptop, a digital photo frame, anavigator, or any other product or component with display functions. Theimplementations of this display device can refer to the embodiments ofthe electroluminescent display panel described above, and this displaydevice also has the beneficial effects owned by the electroluminescentdisplay panel described above, and the repeated description thereof willbe omitted here.

For the electroluminescent display panel and the display device providedby the embodiments of the disclosure, firstly the display regionincludes a photosensitive device arranging region, and a camera orfingerprint recognition device is arranged in the photosensitive devicearranging region, rather than in the frame, and thus a relatively largerarea occupying in the frame is avoided, to allow the frame be madenarrower, and the screen-to-body ratio be increased.

Secondly for the photosensitive device arranging region, the firstsignal lines and the second signal lines are arranged more intensivelyby arranging overlap areas in the orthographic projection of one firstpixel on the base substrate, to allow the display panel have moreconcentrated space as the light-transmission region, so that the lighttransmittance of the photosensitive device arranging region can beincreased to provide more lights to the camera or fingerprintrecognition device so that the camera or fingerprint recognition devicecan work normally and efficiently.

What is claimed is:
 1. A display panel, comprising: a display regioncomprising a first display region and a second display regionsurrounding at least a part of the first display region; the displayregion comprises a plurality of pixels comprising first pixels locatedin the first display region; wherein the first display region compriseslight-transmission region; wherein the display panel further comprises:a base substrate, and a plurality of first signal lines and a pluralityof second signal lines located on the base substrate, wherein the firstpixels are electrically connected to the plurality of first signal linesand the second signal lines respectively, the plurality of first signallines are arranged in a column direction and extend in a row direction,and the plurality of second signal lines are arranged in the rowdirection and extend in the column direction; and wherein anorthographic projection of at least one of the plurality of first signallines and the plurality of second signal lines, passing through thefirst display region, on the base substrate is a folded-line shape. 2.The display panel of claim 1, wherein each orthographic projection of atleast two adjacent first signal lines, passing through the first displayregion, of the plurality of first signal lines on the base substrate isthe folded-line shape.
 3. The display panel of claim 1, wherein eachorthographic projection of at least two adjacent second signal lines,passing through the first display region, of the plurality of secondsignal lines on the base substrate is the folded-line shape.
 4. Thedisplay panel of claim 1, wherein each orthographic projection of allfirst signal lines, passing through the first display region, of theplurality of first signal lines on the base substrate is the folded-lineshape.
 5. The display panel of claim 1, wherein each orthographicprojection of all second signal lines, passing through the first displayregion, of the plurality of second signal lines on the base substrate isthe folded-line shape.
 6. The display panel of claim 1, wherein the atleast one first signal line, passing through the first display region,of the plurality of first signal lines comprises: a first segment, asecond segment, and a third segment connecting the first and secondsegments of the at least one first signal line, wherein the firstsegment of the at least one first signal line is located in the seconddisplay region and extends along a first direction, the second segmentof the at least one first signal line is located in the first displayregion and extends along the first direction, and the third segment ofthe at least one first signal line extends along a second direction;wherein the first direction is a row direction or a column direction,and the third direction intersects with the row direction and the columndirection respectively.
 7. The display panel of claim 6, wherein atleast two adjacent first signal lines, passing through the first displayregion, of the plurality of first signal lines, each comprises the firstsegment, the second segment and the third segment.
 8. The display panelof claim 6, wherein each first signal line, passing through the firstdisplay region, of the plurality of first signal lines comprises thefirst segment, the second segment and the third segment.
 9. The displaypanel of claim 1, wherein the at least one second signal line, passingthrough the first display region, of the plurality of second signallines comprises: a first segment, a second segment, and a third segmentconnecting the first and second segments of the at least one secondsignal line, wherein the first segment of the at least one second signalline is located in the second display region and extends along a firstdirection, the second segment of the at least one second signal line islocated in the first display region and extends along the firstdirection, and the third segment of the at least one second signal lineextends along a second direction; wherein the first direction is a rowdirection or a column direction, and the third direction intersects withthe row direction and the column direction respectively.
 10. The displaypanel of claim 9, wherein at least two adjacent second signal lines,passing through the first display region, of the plurality of secondsignal lines, each comprises the first segment, the second segment andthe third segment.
 11. The display panel of claim 9, wherein each secondsignal line, passing through the first display region, of the pluralityof second signal lines comprises the first segment, the second segmentand the third segment.
 12. The display panel of claim 1, orthographicprojections of the plurality of first signal lines and the plurality ofsecond signal lines on the base substrate have overlap areas, and in thefirst region, a plurality of overlap areas are located in anorthographic projection of one first pixel on the base substrate;wherein at least one of first signal lines and second signal lines ofwhich orthographic projections on the base substrate having overlapareas corresponding to one same first pixel comprises the first segment,the second segment and the third segment.
 13. The display panel of claim1, orthographic projections of the plurality of first signal lines andthe plurality of second signal lines on the base substrate have overlapareas, and in the first region, a plurality of overlap areas are locatedin an orthographic projection of one first pixel on the base substrate.14. The display panel of claim 13, wherein an orthographic projectionof, at least one of first signal lines and second signal lines of whichorthographic projections on the base substrate having overlap areascorresponding to one same first pixel, is a folded-line shape.
 15. Thedisplay panel of claim 13, wherein a respective one of orthographicprojections of a first part of the first pixels on the base substratehas a plurality of overlap areas, and a respective one of orthographicprojections of a second part of the first pixels on the base substratehas no overlap area.
 16. The display panel of claim 15, wherein an areaof an orthographic projection of a first pixel belonging to the firstpart is smaller than an area of an orthographic projection of a firstpixel belonging to the second part.
 17. The display panel of claim 13,wherein areas of orthographic projections of the first pixels are same.18. The display panel of claim 13, wherein the pixels further comprisessecond pixels located in the second display area; in the second displayarea, each orthographic projection of at least part of the second pixelson the base substrate has an overlap area.
 19. The display panel ofclaim 1, wherein the pixels further comprises second pixels located inthe second display area; wherein an arranging density of the secondpixels is larger than an arranging density of the first pixels.
 20. Thedisplay panel of claim 1, wherein at least one of the first pixelscomprises a first subsection and at least one second subsectionconnected to the first subsection, wherein the second subsection islocated at an edge of a connected first subsection, and an arrangingdirection of the first and second subsections is a first direction or asecond direction; wherein a first pixel with the arranging direction ofthe first and second subsections is the first direction has a length inthe first direction larger than a length in the second direction; and afirst pixel with the arranging direction of the first and secondsubsections is the second direction has a length in the second directionlarger than a length in the first direction; wherein the first directionis either one of a column direction and a row direction, the seconddirection is other one of the column direction and the row direction,and the first direction is perpendicular to the second direction. 21.The display panel of claim 20, wherein in at least a part of adjacentfirst pixels of the first pixels, first and second subsections in theone first pixel are arranged along a first direction, and first andsecond subsections in another first pixel are arranged in a directionperpendicularly to the first direction.
 22. The display panel of claim1, wherein one or a combination of following cases are included: a firstcase: M adjacent first signal lines located in the first display regionform a first signal line group, and a spacing between adjacent firstsignal line groups is larger than a spacing between two adjacent firstsignal lines in the first signal line group; orthographic projections ofrespective first signal lines in the first signal line group and anorthographic projection of one second signal line on the base substratehave M overlap areas, and the M overlap areas are located in anorthographic projection of at least one first pixel on the basesubstrate; and a second case: N adjacent second signal lines located inthe first display region form a second signal line group, and a spacingbetween adjacent second signal line groups is larger than a spacingbetween two adjacent second signal lines in the second signal linegroup; orthographic projections of respective second signal lines in thesecond signal line group and an orthographic projection of one firstsignal line on the base substrate have N overlap areas, and the Noverlap areas are located in an orthographic projection of at least onefirst pixel on the base substrate; wherein M and N are both integersgreater than
 1. 23. The display panel of claim 22, wherein one or acombination of following cases are included: a third case: a length of aspacing in the column direction between two of the adjacent first pixelselectrically connected to first signal lines in a same first signal linegroup is a first length, and a length of a spacing in the columndirection between first pixels which are electrically connected to firstsignal lines in two of the adjacent first signal line groupsrespectively and are adjacent in the column direction is a secondlength, wherein the first length is smaller than the second length; andan fourth case: a length of a spacing in the row direction between twoof the adjacent first pixels electrically connected to second signallines in a same second signal line group is a third length, and a lengthof a spacing in the row direction between first pixels which areelectrically connected to second signal lines in two of the adjacentsecond signal line groups respectively and are adjacent in the rowdirection is a fourth length, wherein the third length is smaller thanthe fourth length.
 24. The display panel of claim 23, wherein at leastone of the first signal line group and the second signal line groupcomprises at least three signal lines, and the first length and thethird length are same.
 25. The display panel of claim 1, wherein thefirst signal line is scan line, reference signal line or light emissioncontrol signal line, and the second signal line is data line or powersupply signal line.
 26. A display device, comprising: a display panel,comprising: a display region comprising a first display region and asecond display region surrounding at least a part of the first displayregion; the display region comprises a plurality of pixels comprisingfirst pixels located in the first display region; wherein the firstdisplay region comprises light-transmission region; wherein the displaypanel further comprises: a base substrate, and a plurality of firstsignal lines and a plurality of second signal lines located on the basesubstrate, wherein the first pixels are electrically connected to theplurality of first signal lines and the second signal linesrespectively, the plurality of first signal lines are arranged in acolumn direction and extend in a row direction, and the plurality ofsecond signal lines are arranged in the row direction and extend in thecolumn direction; and wherein an orthographic projection of at least oneof the plurality of first signal lines and the plurality of secondsignal lines, passing through the first display region, on the basesubstrate is a folded-line shape; wherein a photosensitive device isarranged in the first display region of the display panel.